For reference, what's your experience with boat diving? By the time you gear up with a weighted BCD & 80 cf aluminum tank or whatever? How much lead weight do you use?
Some people do more boat dives in Bonaire; I wouldn't know much about that, since like most I go for the shore diving. Somebody did post a Bonaire trip report doing nearly all boat dives once; I think he & his wife were getting on in years and shore diving wasn't their things. So it can be done.
Of the shore diving, it's mainly divided between north sites & southern sites. The northern end of Bonaire is much hillier, so you're apt to have to walk down a hill (ala 1,000 Steps, which has 60 something steps) or the like (the roughly 6 - 8' giant stride off Oil Slick Leap) to reach the water. I'm not sensing you'll be doing northerns sites, since it's more of a walk.
The southern end of Bonaire is flatter. You can park closer to shore, but even then, a 30' walk wouldn't be unusual, and that's to the water. Expect to walk aways out into the sea to get into about waist deep water before putting on your fins (there's rock near shore, so footing is too treacherous wearing fins), then do a swim out to the reef.
So I think if you shore dive Bonaire, you'll mostly be hitting southern sites. But it's still going to be a bit more work than boat diving (in calm, Caribbean waters, that is).
Richard.